Keywords: Low-Field MRI, Low-Field MRI
Motivation: Spatial resolution in an open low-field MRI that uses surface RF coils for B1-encoding can be improved by repositioning the RF coils within FOV for each TR. However, this approach is limited by space constraints in the left-right dimension. Linear gradients, especially movable ones optimized for a slab, effectively supplement encoding in that direction.
Goal(s): To improve spatial resolution in the left-right direction of an open low-field MRI.
Approach: A linear gradient optimized on B0 slice volume is moved in the anterior-posterior direction dependent on readout slice location.
Results: Movable gradients improve spatial encoding.
Impact: There is an unmet need for open low-field MRIs that can accommodate patients of all sizes and disabilities: this approach to generating high spatial resolution images without the use of volume-encompassing gradients makes open MRI viable.
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